Step-by-step explanation:
For solving, use quadratic formula
Since the
density =mass /volume
if volume is constant we can rewrite the density equation as
volume=mass / density
since volume is just a constant
c*density=mass
where c is some constant that denotes the constant volume
mass and density will be proportional to each other or in other words will be have exactly in the same way if one increase the other will increase if one decreases the other will decrease if one stays constant the other will stay constant
only the fourth choice satisfies the proportionality condition so it must be the correct choice
Using an exponential function, it is found that the half-life of the substance is of 5.23 units of time.
<h3>What is the exponential function for the amount of a substance?</h3>
The function is given by:

In which:
- A(0) is the initial value.
- k is the exponential decay rate.
The parameters are given by:
A(0) = 48, k = 0.1325.
Hence the equation is:

The half-life is the amount of time for which A(t) = 0.5A(0) = 24, hence:






t = 5.23.
More can be learned about exponential functions at brainly.com/question/25537936
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The answer is $57.60
(The original price) 45+ 12.60 (28% of 45) = 57.60
120
Step by step explanation:
Divide 1200 by 10
That equals 120
You can back check by multiplying 120 by 10